New York prosecutors will drop all charges against former International Monetary Fund head Dominique Strauss-Kahn within the next couple of weeks as doubts about the credibility of his accuser persist, according to a report Tuesday.

The expected dismissal of the sex assault charges by the New York district attorney is “a certainty,” an investigator told the New York Post. “We all know this case is not sustainable,” the source said.

Strauss-Kahn, 62, was charged in May with several counts related to the alleged sexual assault of a maid at the New York hotel where he was staying.

After more than a month on house arrest, he was released on his own recognizance on Friday after prosecutors shared their doubts about the accuser with the state Supreme Court judge overseeing the case.

“Her credibility is so bad now, we know we cannot sustain a case with her,” the investigator told the Post. “She is not to be believed in anything that comes out of her mouth — which is a shame, because now we may never know what happened in that hotel room.”

In an interview with a French newspaper, Banon said on Monday that she did not come forward at the time because “everyone told me it would never succeed.” But the allegations coming from New York have led her to think there is “perhaps a chance to finally be listened to.”